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FEATURES
High Efficiency: 91.5% @ 5.0V/12A
Size: 58.4mmx22.80mmx8.4mm
(2.30”x0.90”x0.33”)
Standard footprint
Industry standard pin out
Fixed frequency operation: 350KHz
Input UVLO, Output OCP, OVP, OTP
1500V isolation
Basic insulation
No minimum load required
2:1 Input voltage range
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950-1 (US & Canada)
recognized, and TUV (EN60950-1) certified
CE mark me
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TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=300 LFM, V =48Vdc, nominal Vout unless otherwise noted.) A in PARAMETER NOTES and CONDITIONS E48SR05012 (Standard) Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 75 Vdc Transient (100ms) 100ms 100 Vdc Operating Temperature Refer to Figure 21 for measuring point -40 121 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 1500 Vdc INPUT CHARACTERISTICS Operating Input Voltag
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ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current for minimum, nominal, and Figure 2: Power dissipation vs. load current for minimum, maximum input voltage at 25°C nominal, and maximum input voltage at 25°C. Figure 3: Typical full load input characteristics at room temperature DS_E48SR05012_05222008 3
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ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic 0 0 0 0 Figure 4: Turn-on transient at full rated load current (resistive Figure 5: Turn-on transient at zero load current (2 ms/div). load) (2 ms/div). Vin=48V.Top Trace: Vout, 2V/div; Bottom Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input, Trace: ON/OFF input, 5V/div 5V/div For Positive Remote On/Off Logic 0 0 0 0 Figure 6: Turn-on transient at full rated load current (resistive Figure 7: Turn-on
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ELECTRICAL CHARACTERISTICS CURVES 0 0 0 Figure 8: Output voltage response to step-change in load Figure 9: Output voltage response to step-change in load current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: current (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: 330µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic Vout (100mV/div, 200us/div), Bottom Trace: I out (5A/div). capacitor. Top Trace: Vout
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ELECTRICAL CHARACTERISTICS CURVES 0 0 Figure 11: Input Terminal Ripple Current, i , at full rated output Figure 12: Input reflected ripple current, i , through a 12µH c s current and nominal input voltage with 12µH source impedance source inductor at nominal input voltage and rated load current and 33µF electrolytic capacitor (500 mA/div, 2us/div). (20 mA/div, 2us/div). Copper Strip Vo(+) SCOPE RESISTIVE 10u 1u LOAD Vo(-) Figure 13: Output voltage noise and ripple measurement t
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ELECTRICAL CHARACTERISTICS CURVES 0 Figure 14: Output voltage ripple at nominal input voltage and Figure 15: Output voltage vs. load current showing typical rated load current (Io=12A)(20 mV/div, 2us/div) current limit curves and converter shutdown points. Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 in
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DESIGN CONSIDERATIONS The input source must be insulated from the ac Input Source Impedance mains by reinforced or double insulation. The impedance of the input source connecting to the The input terminals of the module are not operator DC/DC power modules will interact with the modules and accessible. affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a If the metal baseplate is grounded, one Vi pin and few μH, w
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FEATURES DESCRIPTIONS Vi(+) Vo(+) Over-Current Protection Sense(+) The modules include an internal output over-current ON/OFF protection circuit, which will endure current limiting for an unlimited duration during output overload. If the Sense(-) output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode). Vi(-) Vo(-) The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down Figure 16:
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FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either the SENSE(+) or SENSE(-). The TRIM pin should be left open if this feature is not used. Figure 19: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and SENSE (+) the output voltage set point increases (Fig.
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THERMAL CONSIDERATIONS Thermal Derating Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient Heat can be removed by increasing airflow over the module. The hottest point temperature of the module is +121°C. To cooling of the power module is needed over the entire temperature range of the module. Convection cooling is enhance system reliability; the power module should always be operated below the maximum operating temperature. I
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PICK AND PLACE LOCATION SURFACE-MOUNT TAPE & REEL RECOMMENDED PAD LAYOUT (SMD) DS_E48SR05012_05222008 12
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LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE Peak temp. 2nd Ramp-up temp. 210~230°C 5sec. 1.0~3.0°C /sec. 250 Pre-heat temp. 140~180°C 60~120 sec. 200 Cooling down rate <3°C /sec. Ramp-up temp. 150 0.5~3.0°C /sec. 100 Over 200°C 40~50sec. 50 0 1 60 20 180 240 300 Time ( sec. ) Note: The temperature refers to the pin of E48SR, measured on the pin +Vout joint. LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE . Temp Peak Temp. 240 ~ 245 ℃ 217℃ Ramp down max. 4 ℃/sec. 200℃ Pr
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MECHANICAL DRAWING Surface-mount module Through-hole module Pin No. Name Function 1 +Vin Positive input voltage 2 ON/OFF Remote ON/OFF 3 -Vin Negative input voltage 4 -Vout Negative output voltage 5 -SENSE Negative remote sense 6 TRIM Output voltage trim 7 +SENSE Positive remote sense 8 +Vout Positive output voltage DS_E48SR05012_05222008 14
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PART NUMBERING SYSTEM E 48 S R 050 12 N R F A Type of Input Number of Product Output Output ON/OFF Pin Option Code Product Voltage Outputs Series Voltage Current Logic Length/Type E- Eighth 48V S- Single R- Regular 050- 5.0V 12-12A N- Negative R - 0.170” A- Standard Functions F- RoHS 6/6 Brick (Default) (Default) (Lead Free) P- Positive N- 0.145” K- 0.110” M- SMD MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD E48SR1R225NRFA 36V~75V 1.3A 1.2V 25A 88.0% E48SR1R525NRFA 36V
